Region.Union(const Region*) method
Applies to: desktop apps only
The Region::Union method updates this region to all portions (intersecting and nonintersecting) of itself and all portions of another region.
Syntax
Status Union(
[in] const Region *region
);
Parameters
region [in]
Type: const Region*Pointer to a Region object to use to update this region.
Return value
Type:
Type: Status****
If the method succeeds, it returns Ok, which is an element of the Status enumeration.
If the method fails, it returns one of the other elements of the Status enumeration.
Examples
The following example creates two regions, one from a path and the other from a rectangle. The code then uses the rectangular region to update the path region. The updated region is the union of the two regions.
VOID Example_UnionReg(HDC hdc)
{
Graphics graphics(hdc);
Point points[] = {
Point(110, 20),
Point(120, 30),
Point(100, 60),
Point(120, 70),
Point(150, 60),
Point(140, 10)};
Rect rect(65, 15, 70, 45);
GraphicsPath path;
SolidBrush solidBrush(Color(255, 255, 0, 0));
path.AddClosedCurve(points, 6);
// Create a region from a path.
Region pathRegion(&path);
// Create a region from a rectangle.
Region rectRegion(rect);
// Form the union of the two regions.
pathRegion.Union(&rectRegion);
graphics.FillRegion(&solidBrush, &pathRegion);
}
Requirements
Minimum supported client |
Windows XP, Windows 2000 Professional |
Minimum supported server |
Windows 2000 Server |
Product |
GDI+ 1.0 |
Header |
Gdiplusheaders.h (include Gdiplus.h) |
Library |
Gdiplus.lib |
DLL |
Gdiplus.dll |
See also
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Build date: 3/6/2012